Compatibilized resin blends and the preparation thereof
AssigneeDow Global Technologies LLC
InventorsHani Farah, Francisco Lerma, Jr.
Life of this patent
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Abstract
The present invention is a blend of a polymeric hydrocarbon and a thermoplastic polyurethane which is compatibilized a polymeric hydrocarbon that contains low concentrations of isocyanate reactive group. The compatibilizer can be prepared by reacting a modified polymer having pendant or incorporated amine-reactive groups with a hydroxyl amine, a diamine, or a polyethermonoamine. The compatibilized blend may further include a non-TPU engineering thermoplastic to form compatible blends of the polymeric hydrocarbon and the non-TPU engineering thermoplastic. In this case, the TPU is used as a co-compatibilizer.
Claims9
A composition comprising a blend or reactive product of a) a thermoplastic polyurethane, and b) a compatibilizer, which is a polymeric hydrocarbon that contains pendant groups having the following structure:
- where X is NH or O, each R is independently H, —CH3, or —CH2CH3;
- R1 is C1-C4 alkyl or H, where x is from 0 to 50, and where the polymeric hydrocarbon is selected from the group consisting of polypropylene, high density polyethylene, low density polyethylene, linear low density polyethylene, and substantially linear ethylene/α-olefin copolymers.
A composition comprising a blend or reactive product of a) a thermoplastic polyurethane, and b) a compatibilizer, which is a polymeric hydrocarbon that contains pendant groups having the following structure:
- where X is NH or O, each R is independently H, —CH3, or —CH2CH3;
- and where x is from 0 to 50, and where the concentration of the pendant groups is not less than 0.1 weight percent, and not more than 2 weight percent, based on the weight of the compatibilizer.
A method of preparing a compatibilizing composition comprising the step of compounding under reactive conditions a) a thermoplastic polyurethane, and b) a compatibilizer, which is a polymeric hydrocarbon that contains isocyanate reactive groups having the following structure:
- where X is NH or O, each R is independently H, —CH3, or —CH2CH3;
- and where x is from 0 to 50, wherein the concentration of the pendant groups is not less than 0.1 weight percent, and not more than 2 weight percent, based on the weight of the compatibilizer.
Dependencies are inferred from the claim text.